Mechanical movement.



E. CIARLO.

MECHANICAL MOVEMENT. APPLlcATloN FILED Aue.14. 1912.

Patented Aug. 10, 1915. 1

E. CIARLO. MECHANICAL MOVEMENT. APPLICATION .111:0 AuG.14. 1912.

Patented Aug. 10, 1915.

2 SHEETS-SHEET 2- SMM M, fw

ED STATES PATENT OFFICE.

' ESTEBAN CIARLO, 0F FOUNTAIN HILL, PENNSYLVANIA.

MECHANICAL MOVEMENT.

Specication of Letters Patent.

Patented Angera, 1915.

Application led August 14, 1912. Serial No. 715,051.

To all whom 'it may concern Be it known that I, ESTEBAN CIARLo, acitizen of Argentina, and resident of Fountain. Hill, in the county ofLehigh and State of Pennsylvania, have invented certain new and usefulImprovements in Mechanical Movements, of which the following is aspecification.

This invention relates to variable driving mechanisms for use inmultiple cylinder pumps. or motors, whereby the stroke of the pistonsmay be varied to change the output of the pump or the speed of themotor, and 1s particularly applicable to variable speed fluidtransmission devices.

In variable speed fluid vices 'a pump is used in connection with ahydraulic motor, the liquid passing directly from the pump cylindersintothe motor cylinders to operate the motor. In order to vary the speedof the motor it is customary in such devices to provide means forvarying the stroke of the pump pistons, and in order to reverse themotor it is customary to reverse the action of thepump pistons.

When the invention is used in connection with a variable speed fluidpressure motor,

the motor receives a constant supply of the motive iuid and the pistondisplacement of the motor is also constant. It will therefore be obviousthat the speed of the motor will be inversely proportional'to the strokeof the pistons.

The present invention has for its Object the provision of a mechanismwhich is simple in construction, is capable of transmitting considerableamounts of power, and which may be accurately and convenientlycontrolled.

The novel features of the invention will be apparent from the followingdescription taken in connection with the accompanying drawings, in whichthe invention is shown as embodied in a multiple cylinder pum adaptedfor use in a variable speed iiui transmission device.

In the drawings: Figure 1 is a longitudinal section through a pumpembodying the a frame which carries the pump cylinders 11, thesecylinders beingpreferably arranged radially about the center of thedriving shaft transmission de- 12. The shaft 12 may have arranged on thepro]ecting end 13 thereof a coupling, pulley or gear for the purposeofdriving the same, and is hollow to receive the longitudinally movablewedge member 14. The shaft 12 is provided with an integral flange 15, aremovable'flange 16 and a rectangular portion 12a, the removable liangebeing held in position by means of a shoulder at 12", the end of therectangular portion 12a, and an eccentric sleeve 17 and suitablenuts 18and `19, the latter having screwHthreaded engagement with the end of theshaft. The shaft 12 is carried in suitable bearings 20 and 21 and hasarranged thereon a thrust collar 22 which is held in position by asuitable sleeve 23 having threaded engagement with the shaft. 0n theopposite sides of the thrust collar 22 are arranged the thrust bearings24 and 25, the thrust bearingJ 24 engaging a shoulder 26 on the bearingmember 27 carried by the frame 10, and the bearing 25 being secured inposition by a cap or bonnet 28 which may be secured to the bearingmember 27 by means of screw threads 29, Orin any other suitable manner,and which `carries suitable packing means 28 surrounding the shaft.

Eachof the pump cylinders 11 hascooperating therewith a valve 30arranged in a cylinder 31 connected with the cylinder 11 by a suitableconduit 32. The eccentric sleeve 17 may be rigidly secured to the shaft12 and has arranged thereon a bearing sleeve 33` provided with aninturned concentric flange 34 which coperates with a similar flange 35on the nut 36 to hold the eccentric strap 37 in position, the strapbeing provided with laterally projecting flanges 38 and 39 whichcoperate with the above-mentioned flanges 34 and 35. The eccentric strap37 is provided with the radially extending arms 40.which are connectedwith the valves 30 by means of' pins or pivots 41.

means of screw threads 49 and being held in position by means of asuitable screw 50 which prevents the collar 48 from turning.

The rectangular portion 12a Yof the shaft l2 has arranged thereon a ring51 having a rectangular opening, two faces of which may be arranged toengage opposite faces of the rectangular portion of the shaft. In orderto provide for wear, these faces of the ring may be provided with cheekor bearing plates 51a which lit between the shaft and the ring and causethe ring to be turned by the shaft. The other-two facesl of therectangular opening in the ring 51 are spaced apart asuflicient distanceto permit the ring to 'be moved transversely of the shaft l2. Rollerbearings 52 are arranged between the rings 51 and 46.

The wedge member 14 is provided with an oblique or wedge portion 53 andsecured to this oblique or Wedge portion 53 are the laterally projectingkeys 54 which engage suitable slots or keyways 55 on-the interior of theshaft 12. Wedge blocks 56 and 57 are arranged between the ring 51 andthe oblique portion 53 of the wedge member and have their inner facesinclined to correspond with the wedge member, whereby the' Wedge blocksand the ring 51 may be shifted transversely of the shaft 12 by alongitudinal movement of the Wedge member 14. The wedge member 14 isalso provided with the cylindrical end portions 58 and 59, the former ofwhich `is arranged in a suitable cylindrical bore 60.in the shaft 12.The extension 59 of the wedge member projects beyond the end of theshaft 12 and is connected lwith suitable mechanism for moving the wedgemember endwise.

The mechanism for moving the wedge member 14 preferably consists of aninternally threaded sleeve or cam member 61 which engages an externallythreaded or coperating cam member 62, the latter being connected withthe extension 59 of the Wedge member by means of two ball thrustbearings 63 and 64. The end of the extension 59is preferably reduced indiameter as at 65, and beyond the portion 65 is a portion 66 of stillsmaller diameter forming a shoulder against which is clamped a thrustlring 67 by means of a nut 68, the latter being preferably secured inposition by means of a pin 69. The member 62 has an internal recess inwhichv are arranged the thrust bearings 63 and 64, these bearings beingheld in position by the flange 70 and the threaded hub 71 on the rod 72,this rodbeing slidably arranged in a suitable bearin 73 supported by theframe 10.

gfhe construction just described, as will be readily understood, permitsthe wedge member 14 to rotate relative to the rod 72 and the member 62.The sleeve 61 has secured thereto in any suitable manner the vto theframe 10 in any suitable manner and has arranged on the opposite sidesthereof the ball thrust bearings 81 and 82, the bearing 81 beingpreferably in engagement with the back of the -bevel gear 74 and bothbearings being held in position by means of suitable nuts 83, which arethreaded on the exterior of the sleeve 61. As will be readily seen fromFig. 1, the thrust bearings 81 and 82 and the member 62 support thesleeve 61 and hold the same against movement longitudinally of the shaft12.

' The operation of the mechanism is as fol- Vlows: As shown in Fig. 1.the wedge blocks -56 and 57 and the ring 51 are in their central orneutral position so that the ring 46 is concentric with the shaft 12,and therefore when the shaft 12 is rotated the pistons 42 will remainstationary. By shifting the wedge 4member 14 in either direction fromthe position shown, it will be seen thatthe wedge blocks 56 and 57 andthe rings 46 and 51 and the connecting rods 44 will be shifted laterallyof the shaft and thereby cause the ring 46 to be arranged eccentric tothe shaft 12 so that when `theshaft is rotated the pistons 42 will bereciprocated in their cylinders 11. It will also be seen that byshifting the wedge member 14 to the right from the positiqn shown inFig. 1, the ring 46 will be moved downwardly, and by shifting the wedgemember 14 toward the left the ring will be moved upwardly so that thedirection of movement of the pistons 42 will be reversed in moving thewedge member from one side of the neutral position to the other. Sincethe eccentric 17, which actuates the valves 30, is lixedto the shaft 12,it will be understood that when the direction of movement of the pistons42 is reversed the valves 30 will always coperate to reverse thedirection of flow of the Water or other fluid which is pumped.

The shaft 12 will ordinarily be driven at a constant speed from anysuitable source of power and it is therefore desirable to be able toshift the Wedge member 14 without stopping the shaft 12. This may beaccomplished by the mechanism which I have disclosed and, as will bereadily understood, the member 62 and the wedgel member 14, which isconnected therewith, will be moved longitudinally of the sleeve 61 whenthe sleeve is rotated. The rotation of the sleeve 61 is effected bymeans of the hand wheel 79, and the member 62 may be moved in eitherdirection by means of this hand Wheel.

It will be observed that all of the Working parts are thoroughlyinclosed and are lso so arranged that in case of necessity they may bereadily taken apart. By the provision of ball bearings throughout themechanism very little e'ort is required on the part of the operator toadjust the mecha` nism, and the wear on the moving parts is reduced to aIt will be obvious'to'those skilled in the art that vario's changes maybe made in the minor details of the invention within the scope of the.appended claims and therefore I do not wish to be limited to the precisedetails of construction shown and described.

Having thus described the invention, what` is claimed is:

1. In apparatus of the class described, the

combination of a hollow shaft, having a shoulder, ak iange spacedtherefrom and a through transverse slot between 'said shoul` der andflange, a removable flange arranged in abutting relation to saidshoulder, a transverse? shiftable eccentric arranged between said angesand rotatable with said shaft, an axially movable wedge member arrangedin said shaft, and means operatively connecting said wedge member withsaid eccentric.

2. In apparatus of the class described, the combination of a hollowshaft, havin a shoulder, a flange spaced therefrom an a throughtransverse slot between said shouly der and ange, anv axially removablefiange 1 ranged between sai arranged in abutting relation to saidshoulder, a nut on said shaft coperating with said shoulder to securesaid removable flange,- a transversel shiftable eccentric ard liangesand rotatable with said shaft, anaxially movable wedge member arrangedin said shaft, and means operatively connecting with said eccentric,

3. In apparatus of the class described, the

said wedge `member combination of a hollow shaft having a rectangularportion anda through transverse slot in said rectangular portion, theshaft also having'one or more axially extending internal key-ways, atransversely shiftable eccentric arran ed on said rectangular portion ofthe shaigt, an axially movable wedge member in said shaft having one ormorev keys fitting said keyways, and means operatively connecting saideccentric and wedge member.

14. In apparatus of the class described, the

combination of a hollow shaft, having a flange and a through transverseslot adjacent said iiange, a transversely shiftable onepiece eccentricring alongside of said ange and arranged to rotate with said shaft, a-

removable flange coperating with the rst so mentioned flange to holdsaid eccentric against am'al displacement, means for securing saidremovable flange, and means@ within said shaft for shifting saideccentric.v

5. In apparatus of the class described, the

combination of a hollow shaft, having a ange and a through transverseslot adjacent said flange, a transversely shiftable one piece eccentricalongside of said flange and arranged to rotate with said shaft, an ax-`Il? ially removable ange coperatmg with the first vmentioned flange tohold said eccentric Iagainst axial displacement, a second one-v pieceeccentric on said shaft, a nut threaded on the shaft and securing saidsecond eccentric and removable flange in position, and

.means in said shaft for shifting the firstmentioned eccentric.

In testimony/whereof I aix my signature .in presence of two' witnesses.

ESTEBAN OIARLO. Witnesses: i

E. GRANT T161-, C. L. WRIGHT.

